The pack my boys & I where part of encouraged wearing the uniform but didn't ding anyone for not having all of the official parts. We were happier that you showed up than if you had all the pieces. Remember they are cub scouts. As for the blue VS tan for Webelos, I told my scouts (parents) not to buy the tan shirt until they outgrew the blue. From what I experienced, most scouts out grew the blue shirt by the middle of the webelo year anyway. As far as I remember all of the scouts in each of my boys dens had a full official tan/green uniform by the time they were AOL. Cubs seem to "get it" about uniforms when they reach the webelo level & start interacting with troops.